How to Resolve a B2B Unauthorized Purchase (No-PO) Dispute and Still Get Paid

What a B2B Unauthorized Purchase or No-PO Dispute Is

A B2B unauthorized purchase dispute is when accounts payable refuses to pay because the order was placed without a purchase order, or by someone the company says lacked the authority to commit spend. The customer is not contesting the price, the goods, or the quality; they are contesting whether the company is bound by the order at all. To resolve one and still get paid, run a five-step sequence: acknowledge fast and identify exactly who placed the order and how, evidence the order and the benefit the company received, route the invoice to the budget owner who can authorize it rather than the AP clerk with nothing to match, secure a retroactive PO or written ratification, then confirm in writing and close. The key fact is that a company that received and used the goods or services generally cannot keep them for free because internal process was skipped; the path to payment is supplying the missing authorization, not arguing about it. AgentCollect, founded in 2020 and trusted by Fortune 500 companies including Microsoft and Dell, resolves roughly 90% of disputes instantly by giving each account a dedicated AI agent that holds the order trail, the delivery confirmation, and the company contacts in context.

The most common shapes a no-PO dispute takes:

• No-PO invoice -- the order was placed informally and AP has no purchase order to three-way match against.
• Maverick spend -- an employee ordered outside the procurement process, bypassing the PO system entirely.
• Below approval limit -- the orderer was real but committed spend above their authorization threshold.
• Verbal or email order -- the order exists only as a call or message with no formal authorization document.
• Disowned by a department -- a team or contractor placed the order and the company now declines to stand behind it.
• Personnel change -- the person who ordered has left, and no one internally will claim the commitment.

A no-PO dispute is distinct from a pricing dispute (the number is wrong), a quality dispute (the goods failed), a duplicate invoice dispute (already paid), and an invoice matching error (the paperwork fails the three-way match because a field is wrong). The defining feature of a no-PO dispute is that the authorization itself is missing or denied, which is exactly why it is resolved by supplying authorization rather than by argument.

Why "No PO" Freezes the Invoice

The damage from a no-PO dispute is rarely a real question of whether the company owes the money. It is that a missing purchase order is a hard, mechanical blocker inside AP. Most accounts payable systems physically cannot process an invoice with nothing to three-way match against, so the invoice sits in an exception queue, not because anyone decided the company should not pay, but because the workflow has nowhere to route it. The collector who keeps chasing the AP clerk is pushing on the one person who genuinely cannot help.

This is the trap: every week the invoice sits in the no-PO exception queue, your DSO climbs and your recovery probability falls. As an overdue invoice ages past 90 days, recovery probability drops by roughly one percentage point per week. And no-PO disputes are uniquely sticky because the obstacle is organizational: the goods were received by one team, the invoice landed with another, and the person who can authorize it has not been looped in. Nobody is refusing; the invoice is simply orphaned.

How to Tell a Real Authorization Gap from a Stall Tactic

Not every "no PO" is the same. Some are genuine internal gaps that a name and a document will close; some are stalls where the company is using the missing PO purely to delay paying for goods it is happily using. Reading the difference fast keeps you from giving up on a collectible invoice or burning goodwill on a real procurement mess. The signals are reliable:

The fastest, most decisive test is to supply the order evidence and the proof of benefit and ask who can issue a retroactive PO. A genuine authorization gap gets resolved with a name and a document, because the company accepts it received value and just needs the paperwork. A staller keeps the goods and produces neither: no orderer, no PO, no route to anyone who can authorize. The request itself separates a procurement gap from a company that is keeping value for free.

The 5-Step Authorization Playbook

Email Templates for Each Step

How AI Surfaces and Resolves No-PO Disputes

The manual playbook works, but it depends on a human assembling the order trail, evidencing the benefit, and, hardest of all, finding the budget owner who can authorize the spend before the invoice ages. Across hundreds of accounts that is where it breaks down: a human collector handling 250+ accounts cannot trace each orphaned order back to its authorizer in real time, so no-PO invoices, with no clear owner to chase, are among the first to be abandoned. AI collection changes the economics because each account gets its own dedicated agent.

Detection in context. The AI reads each reply. When AP writes "we have no PO for this" or "that person can't authorize spend," the agent classifies it as a no-PO dispute on the spot rather than letting it sit in an exception queue.

Evidence assembly. Because the agent holds the order trail, the delivery confirmation, and the contacts for that account, it immediately reconstructs who placed the order and proves the company received and used the benefit. This is why roughly 90% of disputes are resolved instantly: the agent presents the order and benefit evidence and asks for a retroactive PO, in the same conversation, with no queue and no handoff.

Routing to the authorizer. This is where AI is decisive. A no-PO invoice dies in a clerk's inbox and gets paid in the budget owner's. Intelligence before contact: Contact Finder researches the account to find the manager whose budget the spend belongs to, not just the AP shared mailbox (+130% contacts enriched from a single email address). Attorney mode achieves roughly 70% email open rates versus about 20% for standard agency emails, so the authorization request actually reaches and is read by the person who can say yes.

"Push too hard, they fight back. Push too soft, they ghost you." A no-PO dispute is the sharpest test of that balance: lean too hard on liability and the company digs in; supply the authorization path and it usually just pays. The AI does the latter, evidence and routing, not pressure.

How to Prevent No-PO Disputes

Most no-PO disputes trace back to orders accepted without confirming authorization at the front end. Close that gap and the disputes mostly disappear:

1. Require a PO or written authorization before fulfilling

For any order above a set threshold, do not ship or start work without a purchase order or a written authorization. A confirmed PO at the front end is the document AP will need at the back end, and requiring it turns a future no-PO dispute into a non-event.

2. Confirm the orderer's authority and capture it

When a new contact places an order, confirm they are authorized to commit the spend, and capture their name and approval in writing. A two-minute check up front prevents a maverick-spend dispute weeks later.

3. Send an order acknowledgment with the authorization on file

Acknowledge every order with a note stating the PO number or the authorization you are relying on. This gives the customer a chance to correct a missing PO before fulfillment, not after the invoice is already stuck.

4. Get a signed delivery acceptance

Capture a signed receipt from the receiving party on delivery. Proof that the company accepted the benefit is your strongest lever if authorization is later questioned, because it establishes ratification through conduct.

5. Set up an approved-buyer list for repeat accounts

For accounts that order often or have been maverick-prone, agree an approved-buyer list with the customer's procurement team. Knowing in advance who can authorize spend removes the ambiguity that no-PO disputes feed on. For the broader escalation path when an invoice goes unpaid, see what to do when a client won't pay.

Frequently Asked Questions

What is a B2B unauthorized purchase or no-PO dispute?

A B2B unauthorized purchase dispute is when accounts payable refuses to pay because the order was placed without a purchase order, or by someone the company says lacked the authority to commit spend. The customer is not contesting the price, the goods, or the quality; they are contesting whether the company is bound by the order at all. Common forms include a no-PO invoice AP cannot match, maverick spend outside procurement, an order above the orderer's approval limit, a verbal or email order with no formal authorization, and a department that disowns the spend. Resolution turns on proving who ordered, that the company received and used the benefit, and securing a retroactive PO or ratification.

How do you get paid when there is no purchase order?

Work it in five steps. First, acknowledge fast and identify exactly who placed the order and how. Second, evidence the order and the benefit: the order request, the delivery confirmation, and proof the company accepted and used what it received. Third, route the invoice to the budget owner who can authorize it, not the AP clerk who has nothing to match. Fourth, secure a retroactive PO or written ratification so AP has a document to process, and isolate any clearly authorized portion to collect now. Fifth, confirm the authorization and payment date in writing. A company that received and used the goods generally cannot keep them for free because internal process was skipped.

Can a customer refuse to pay just because there was no PO?

Usually not if they received and used the goods or services. A missing purchase order is an internal procurement control, not a defense to payment, and a company that accepted the benefit of an order has typically ratified it through its conduct even without a formal PO. That said, a missing PO is a real practical blocker: AP often cannot physically process an invoice with nothing to three-way match against. So the issue is rarely whether the company owes the money and usually whether AP has the paperwork to pay it. The resolution is to supply the missing authorization, prove the order and the benefit, then obtain a retroactive PO so AP can clear the invoice.

How can I tell a real authorization problem from a stall tactic?

A real authorization problem is specific and cooperative: AP can identify who ordered, acknowledges the goods or services were received, and works with you to get a retroactive PO or route it to the budget owner. A stall dressed as "no PO" is evasive: the company keeps using what it received, will not identify who placed the order, refuses to route the invoice to anyone who can authorize it, and uses the missing PO purely to delay. The fastest test is to provide the order evidence and proof of benefit and ask who can issue a retroactive PO; a genuine gap is resolved with a name and a document, a stall produces neither. AI collection surfaces this by tracing the order and the benefit in context and routing to the right authorizer.

How does AI help resolve unauthorized purchase disputes?

AI collection detects a no-PO or unauthorized-order claim the moment it appears, then assembles the order and benefit evidence instead of routing it to a queue. Because each account has a dedicated AI agent holding the order trail, the delivery confirmation, and the company contacts, it can identify who placed the order, evidence that the company received and used the goods or services, and route the invoice to the budget owner who can issue a retroactive PO rather than the AP clerk with nothing to match. Contact Finder is decisive here: a no-PO invoice dies in a clerk's inbox and gets paid in the budget owner's. Roughly 90% of disputes are resolved instantly, with the relationship preserved.

How do I prevent unauthorized purchase disputes before they happen?

Most no-PO disputes trace back to orders accepted without confirming authorization at the front end. Prevent them by requiring a purchase order or written authorization before fulfilling any order above a set threshold, confirming the orderer's authority and capturing their name and approval in writing, sending an order acknowledgment that states the PO number or authorization on file, getting a signed delivery acceptance from the receiving party, and putting the authorizing person and reference on every invoice so AP can match it. For repeat or maverick-prone accounts, set up an approved-buyer list with the customer.

Resolve Disputes Without Losing the Relationship

A no-PO dispute is not a sign the money is lost. It is a sign the invoice needs authorization and routing: the orderer named, the benefit evidenced, and the invoice put in front of the budget owner who can issue a retroactive PO. The hard part is doing that consistently across every account, every time, before the invoice ages. That is structurally what one human stretched across 250+ accounts cannot do, and what a dedicated agent can.

1 AI agent per account. Every disputed invoice gets an agent that reconstructs the order trail, proves the benefit, finds the budget owner, and works the account across email, phone, SMS, and attorney letters over a 12-month mandate, not two emails and a stop. The result: ~50% recovery in 20 days versus 20-30% over months for traditional agencies.

90% of disputes resolved instantly. No-PO, pricing, quality, "I never got it" -- the agent accesses your records and settles them in the same conversation. Direct payment, same day. The customer pays you directly through a secure link, with zero compliance incidents and capacity up to 85,000 recoveries per day.

Related reading: All Dispute Playbooks | Pricing Dispute | Quantity Dispute | Delivery Dispute | Invoice Matching Error | Quality / Defect Dispute | Duplicate Invoice | Service / Scope Dispute | Client Won't Pay Invoice? 8 Steps | Recovery Probability Calculator